1. C

    oven circuit but not what i normally expect

    a 20a RCBO supplies a 6mm twin and earth cable that supplies a dedicated socket mounted securely below the oven. The dedicated socket is controlled via a 40a double pole isolator above on the counter top. It appears at some point a juicy oven has been replaced by a much lower 2.2Kw oven on a...
  2. 123

    Domestic - What do you normally use?

    If doing a domestic rewire, refurb or additions - what do you normally use to protect the cable?
  3. sythai

    New to me : Air Source Heat Pump

    Hi Chaps Starting 3 new builds shortly. Had brief chat with plumber today over phone, mentioned that an air source heat pump will be part of the set up. Pressurised system with buffer tank, UFH ground floor & rads first floor. It's a first but never had anything to do with air source heat...
  4. BigSim

    MWC or EICR

    Hi all. I normally get a lot of remedial work from the other guys who carry out the EICRS. Some of the faults might include untraceable circuits, which after a bit of investigation can normally be found. Now, when I find these circuits then I inspect, test, and complete a separate EICR...
  5. B

    Type of DNO supply question

    I was installing a new control panel in a pumping station kiosk the other day. Sometimes I am required to `enter` the DNO supply to insert the earth cable on what is normally a TNCS system. To my surprise the supply was a single core with the armourings supplying the system earth but no neutral...
  6. T

    EICR Limitations

    When doing EICR, what you people normally put for extend covered? Also do people have a general list of things you put as Limitations when testing? IE no moving furniture, no portable appliance,
  7. J

    Wiring thermostat

    Would the wiring on this Sunvic cylinder thermostat Sunvic SA2452 Cylinder Thermostat 3KB Pic 1 be the same as this Sunvic 4KB Pic 2
  8. M

    PIR sensor problem

    I have fitted an independent PIR in the hall way. When energising PIR, the light comes on and stays on. When the sensor is activated, the light goes out??? I have wired it as to the suppliers diagram. Is it a faulty PIR???? mick223
  9. J

    Intermediate switching or not?

    Hi all, i will ill keep this brief. i have a lighting circuit in a communal hallway operating four sets of lights by each push button Time release switches (you know the ones. Council property converted house type) now my question is should the middle switches be intermediate switches or just...
  10. I

    Tax rebate on tools and testing equipment

    I've just got into the self employed/self assessment loop. I don't know which way is up after reading so much bumph. HMRC site just takes you round in circles. Any pointers would be greatly appreciated. I shall be using Cash basis tax format. So does anyone know :- what I can claim for, how much...
  11. dez0178

    danfoss 103E5 control unit for central heating problem.

    Hi, My control unit is operating. The time is displaying and you can use the various functions but the problem is there is no red light illuminating and will not come on. Even the 1hr+ option isn't kicking in. The heating has been used since approx. early april. Hot water fine and so is boiler...
  12. marksparky

    how to wire relay

    hi folks, I need to wire a pipe stat to bring on a circulating pump with out firing the oil boiler, I believe that the only way to do this is by wiring through a relay so that the switched live from the stat sends power to the pump but doesn't back feed and energise the oil burner. any thoughts...
  13. SJD

    EICR code for tripping MCB?

    While carrying out a periodic inspection and test, I have a socket circuit where after power is removed for a while, then restored, the B16 MCB trips fairly reliably. There are quite a number of office-type appliances connected that are always switched on (PCs, printer, shredder, surge...
  14. S

    Agency work

    Hi folks, this is to anyone with experience of working through agency as a general contractor (not self employed). I've been offered a few temporary roles on agency recently ranging from a few weeks worth of work to a few months. I've been fortunate that most my career i've been on the books...
  15. rustynails

    general purpose timeswitch help!

    hi all, I'm having a nightmare with a Newlec NL24HRTS 24 hour General Purpose Timeswitch. The customer wanted to swap an old pin type timer for this new timer. So I went about fitting it and I cannot get it to operate correctly. The time switch would be used to turn on 3 outdoor lights for...
  16. Robertbaker63

    goliath 250 worklight ballast

    my goliath 250 worklight stopped working, its a 55w 4 pin 2d lamp the ballast has blown, does anyone know where to get a replacement, if i search the original model - a visonator VEB155TC all i get is links to Taiwan sites many thanks to anyone who can help me
  17. F

    Danlers PIR

    Hi, I have installed a Danlers occupancy PIR in a bathroom. This operates two 4.5watt LED bulbs contained in the obvious downlight housings and a Icon low voltage fan. When the PIR timer runs out the fan carries on running indefinitely. There remains around 50volts at the fan transformer. I...
  18. S

    For Sale Quantity of memshield 3 mcbs new and sq d qoe used mcbs/main switches

    Have a quantity of MEMSHIELD 3 mcbs for sale, leftovers from several projects All are new , but not boxed also some used in excellent conditon Sqaure D QOE MCBS (the ones with the yellow stripe on them ) , B6 , B16 B20 and B32 in various quantities. also 2x double pole 100A...
  19. D

    Trunking cable capacity

    Hey folks, im wiring in a shower circuit, i've decided on singles in PVC trunking (10mm line/neutral) (4mm CPC) I've worked out my cable factor in trunking as 87.2...................Problem is OSG shows smallest size trunking as 50mm X 38mm Thats way to big!!!! Can anyone point me in the right...
  20. W

    NIC Approved contractor periodic assessment

    Got my first annual assessment on wed, since upgrading from DI last year, how many jobs will he normally want to see is it still five or is it less after your initial main assessment?
  21. L

    Commercial Nightclubs and testing???

    Hi Sparkies Please can anyone tell me how often a nightclub should have a periodic inspection carried out. I thought that if a property had a public entertainment licence that it was every year, but I have also been told every 5 years. Muchas grasias
  22. F

    Domestic DPDT relay connections

    Hi please can someone help on relay wiring. I have a dpdt relay of 30 amps(all 230v) i am using a central heating control to power the coil to turn relay on, as i understand i put the switched live and neutral to pins A1 and A2 from central heating control, to energise the coil to switch the...
  23. E

    Where can i find a 100A/63A change over relay/contractor????

    Anyone know where can i find a 100A/63A change over relay/contractor???? hears a little diagram so you know what im after
  24. La Poste

    Contactors vs relays.

    Does anyone know why contactors are more expensive than relays? In my mind they do the same thing in fact relays do more (IE normally on/ normally off terminals) so why the difference in price IE contactors are more expensive, I don't get it. Thanks.
  25. B

    About alarm systems?

    I have limited knowledge about alarm systems, i no only the very basic things about them, but i am wondering can any make outside bell box be linked to any make alarm system? I no its a bit of a strange thing to say but if anybody can pass on any information that they think could help me for...
  26. N


    I am resistered with NICEICE but i am not busy. how can i get more work ,i live in london. I'm hoping someone would be able to help me, Any advice will be greatly appreciated
  27. H

    metal containment within battery store

    does anyone know if there is any chemical reaction with galv conduit within a chemical/battery store? is enamal better
  28. B

    Industrial Pilz Relays

    i am an apprentice in a factory doing electrical engineering. i would like to know how pilz safety relays work, and how they are wired into an electrical circuit. any info would be appreciated.
  29. C

    relays, time delayed

    hi, i am connecting a time delay relay onto a lighting circuit. i am going to have a switch on the circuit, when you switch the light on it should go on and stay on, until the switch is switched off again. when the switch is switched off, i want the light to stay on for ten minutes then go off...
  30. Goody

    Domestic Isolator switchs for bathroom extractors

    Hi, Isolator switches for the bathroom extractors, could they be in the loft rather than the unsightly position on the wall outside the bathroom? “Electrical Installers’ Guide to the Building Regulations” or the “Red Book” doesn’t say anything about their position. Could someone shed some...
  31. J

    PIR sensor

    Im in need of a really good pir sensor for some flood light, the customer doesnt want it going off when leaves move ect just wondered if any one had any recommendation as i normally just buy cheap one's from screwfix and have notice they have this problem thanks for the help jimmy
  32. C

    Domestic earth leakage tumble dryer

    hi guys tumble dryer is tripping the rcd ,tested the rcd 0.5, x1 and x5 all worked out ok, even ran a extension lead from the house to the tumble dryer (normally fed by sub-main in outhouse) turned on and tripped the rcd in the house, 1) now i was wondering if there was a way to measure the...
  33. R

    Service cut out Fuse the red ones.

    Hi just wondering if anyone knows the rating of the red service head fuses? I havent come across one with a label on it yet and when I pulled one the other day I was going to have a look but they seem to have something like a rivet holding it together where the screw normally is. I'm thinking...
  34. B


    Now we don't have to notify a PIR and therefore we don't have to be with one of the self-certification schemes to do them. However what happens when the PIR shows up some faults? I assume if the faults require repairs which are notifiable then we're back to square 1 and we need to be a member or...
  35. G

    Verification of volt drop

    Hi, I know how to calculate volt drops on radial ccts, As a ring main is a loop and you ignore any spurs is there a voltage drop or is it considered to perfect or near perfect mains voltage regulation!. How do you,or dont you verfiy votage regulation on a ring main when certifing that you...
  36. E

    Periodic Assessment

    Oh no i have my periodic assessment tomorrow for the first time. For some reason im really nervous. any thing i should know that i dont already ? how long does he normally stay with you ? its only the domestic installer scheme and i got everything ready.
  37. B

    why Pfc is 16kA in Installation Cert?

    In the Installation Certificate, the Pfc of supply is 16kA, but on the top of testing results, the Pfc normally is 1 or 2kA, normally less than 6kA. Why the 2 numbers are so different? cheers
  38. G

    Domestic Drilling Flat Roof Joists

    Are we allowed to do this ? If yes is it the same hole size/distances as floor joists ? I normally use the safe zones, but this isn't possible as its like an all glass byfold door type extension. I'm thinking I can as surely floor joists have just as much weight on them, thought I'd see what...
  39. S

    Sign off private work

    Hi all - I have heard an understanding - that to be able to sign off private work you need minimum: 2330 Level 2 2382 17th Exam Part P Exam I've heard that at the moment you don't NEED 2392 or 2391 to join some electrical bodies? Is this true?? Can anyone confirm exactly what qualifications...
  40. S

    testing for borrowed neutrals

    on changing fuse boards has anyone got a sucssesful method of testing for borrowed neutrals before changing ? finding probs on changing boards then to find borrowed neutrals on two way lighting on stairs and wall lights thanks for any feedback !
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